4 Fig. 4 shows a cumulative frequency diagram for the time spent revising mathematics by year 11 students at a certain school during a week in the summer term.
\begin{figure}[h]
\includegraphics[alt={},max width=\textwidth]{cea67565-8074-4703-8e1a-09b98e380baf-05_554_1070_737_242}
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\caption{Fig. 4}
\end{figure}
- Use the diagram to estimate the median time spent revising mathematics by these students. [1]
A teacher comments that \(90 \%\) of the students spent less than an hour revising mathematics during this week.
- Determine whether the information in the diagram supports this comment.